Chill-hardening adhesive



Patented Sept. 10, 1935 PATENT OFFICE CHlLL-HARDENING ADHESIVE Kent M.ltichardsom winona, Minn, and David J. Harding, KansasCity, Kans.,,assignors, by 1 mesne assignments, to Industrial PatentsCorporation,.(lhicago, 111., a corporation of Delav No Drawing.Application July 14, 1928, Serial No. 292,910

2 claims. (01.149-2) This invention. concerns mainly the packingindust-ry and relates especially to adhesive coating materials which aresubstantially fluid when hot and which congeal upon chilling, particular5 reference being had to. such materials adapted foruse as food carcassdepilatories.

The main objects of the invention are to provide an improved and lessexpensive material or compound than those heretofore known or used forthe purposes specified; to provide for thus utilizing such common andinexpensive materials as rosin and cottonseed oil; to provide such adepilatory adapted for liquefaction in mass by moderate heat and forsubsequent setting when applied as a coating and chilled; to providesuch a material adapted for spraying when hot and adapted for strippingoff together with all epidermal 'excrescences and other extraneousmatter when set as a hard coating; and to provide an effective carcassstripper thus composed adapted for ready renovation, by heatliquefaction and filtration, for reuse.

We find that the foregoing objects are acco plished by fusing togethercertain resinous and unguinous materials in appropriate proportions and:then applying the hot compound as a thin coating to the skin of thecarcass to be treated. Then the coating is chilled and removed, carryingwith it all hair and other extraneous material. The compound is thenrecovered by fusing and straining out the foreign matter. A preferredform of this material or compound consists, of about 90% of rosin with acomplement of cottonseed oil. The rosin may vary from 88% to 93%,the-lower percentage adapting the com pound for machine removal and thehigher for hand removal, the latter being somewhat the stifler. Thiscompound can be produced in quantity for about four cents per pound. 40Another embodiment of our depilating compound is more particularlydescribed and claimed in our copending application, Serial No; 7430,filed February 20, 1935, entitled Depilating adhesive, which applicationis a division of the pres- 46 ent application.

The method of using the depilatory of the pres- I ent application andthe depilatory of our co-pending divisional application Serial No. 7430is illustrated in our prior United States Patent No.

50 1,748,082, dated February 25, 1980, entitled, Carcass treatingmethod. The coating material is prepared by mixing and melting theresinous and .mutually complementary unguinous ingredients, or byremelting an old mixture.

Then the resultant fluid depilatory is applied in 5 any desired mannerdirectly to the skin surface to be cleaned, as-by spraying, brushing on,or by dipping the carcass. The adherent coating is then quickly chilledin any convenient manner,

as by means of a cold water spray. 10 The hardened coating, which may bemore or less brittle, together with all epidermal excrescences andextraneous matter set therein is then removed in any way which may, befound convenient. Although the coatings may .1 be 15 stripped off byhand if of appropriate or rather yielding consistency, still it isgenerally preferable to strike them off with a power beater or by meansof a so-called polisher. For beater removal a relatively hard andbrittle coating is best. 20

The harder the coating desired, the more rosin is used and the more thecoating is chilled prior to beating off. I

The value of these materials and their use in the packing industry liesnot only in their econo- 25' my of labor, but also in getting "on intohigher grades, due to enhancing the. appearance of the meat product. Wehave never been able to ,detect any deleterious effect of any sort oncarcasses treated with these coatings. I 30 Although but one'specificembodiment of this invention is herein described, it is to be understoodthat no attempt has been made to describe specifically all usefulembodiments and that some of the details set forth may be altered oromitted 35 without departing from the spirit of the invention, asdefined by the following claims.

a 'We claim;

1. A depilatory comprising about ninety per cent of rosin and acomplement of cottonseed oil. 40 2. A fusible chill-hardening adhesivedepilatory coating material of substantially uniform amorphousconsistency adaptedto be sprayed when hot and adapted for strippingordinary epidermal excrescences from edible carcasses whenappliedas acoating and chilled, comprising about ninety per cent of rosin and tenper cent of unguinous material. p

KENT M. RICHARDSON.

DAVID J. HARDING.

